Calculate the amount of heat required to completely sublime 28.0 g of solid dry ice (co2 at its sublimation temperature. the heat of sublimation for carbon dioxide is 32.3 kj/mol.

Answer : The amount of heat required to complete sublime of is 20.5 kJ.

Explanation :

First we have to calculate the moles of .

Now we have to calculate the amount of heat required to complete sublime of .

As, 1 mole of on sublimation required heat = 32.3 kJ

So, 0.636 mole of on sublimation required heat = 0.636 × 32.3 kJ = 20.5 kJ

Therefore, the amount of heat required to complete sublime of is 20.5 kJ.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.